SE7714024L - HYDRAULICALLY POWERED SLOW DEVICE - Google Patents

HYDRAULICALLY POWERED SLOW DEVICE

Info

Publication number
SE7714024L
SE7714024L SE7714024A SE7714024A SE7714024L SE 7714024 L SE7714024 L SE 7714024L SE 7714024 A SE7714024 A SE 7714024A SE 7714024 A SE7714024 A SE 7714024A SE 7714024 L SE7714024 L SE 7714024L
Authority
SE
Sweden
Prior art keywords
piston
striker
chamber
flanged portion
area
Prior art date
Application number
SE7714024A
Other languages
Swedish (sv)
Inventor
D R James
Original Assignee
Af Hydraulics
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Af Hydraulics filed Critical Af Hydraulics
Publication of SE7714024L publication Critical patent/SE7714024L/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D9/00—Portable percussive tools with fluid-pressure drive, i.e. driven directly by fluids, e.g. having several percussive tool bits operated simultaneously
    • B25D9/06—Means for driving the impulse member
    • B25D9/12—Means for driving the impulse member comprising a built-in liquid motor, i.e. the tool being driven by hydraulic pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D9/00—Portable percussive tools with fluid-pressure drive, i.e. driven directly by fluids, e.g. having several percussive tool bits operated simultaneously
    • B25D9/14—Control devices for the reciprocating piston
    • B25D9/26—Control devices for adjusting the stroke of the piston or the force or frequency of impact thereof
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S173/00—Tool driving or impacting
    • Y10S173/04—Liquid operated

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • Automation & Control Theory (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Actuator (AREA)
  • Fluid-Damping Devices (AREA)

Abstract

A hydraulically-operated percussive device comprises a piston/striker reciprocable in a housing and valve means adapted to intermittently pressurize a working area of the piston/striker to produce forward working strokes thereof. The housing contains a chamber adapted to be pressurized by the hydraulic working fluid to apply a continuous return force to a differential return area of the piston/striker which has a step arranged to enter a dashpot cavity at one end of the chamber to damp forward movement and thereby limit overstroking of the piston/striker. The piston/striker has an intermediate flanged portion which is a close sliding fit in the chamber end regions of which are interconnected through a conduit so that both annular end faces of the flanged portion are subject to the fluid pressure. The end faces are of different efective areas with the difference providing said differential return area and the larger end face providing the step.
SE7714024A 1976-12-10 1977-12-09 HYDRAULICALLY POWERED SLOW DEVICE SE7714024L (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB51570/76A GB1556754A (en) 1976-12-10 1976-12-10 Hydraulically-actuated percussive device with overstroke damping

Publications (1)

Publication Number Publication Date
SE7714024L true SE7714024L (en) 1978-06-11

Family

ID=10460530

Family Applications (1)

Application Number Title Priority Date Filing Date
SE7714024A SE7714024L (en) 1976-12-10 1977-12-09 HYDRAULICALLY POWERED SLOW DEVICE

Country Status (17)

Country Link
US (1) US4149602A (en)
JP (1) JPS5372702A (en)
AT (1) AT361416B (en)
AU (1) AU505754B2 (en)
BE (1) BE861259A (en)
CA (1) CA1059405A (en)
CH (1) CH617117A5 (en)
DE (1) DE2754489A1 (en)
DK (1) DK527177A (en)
ES (1) ES464623A1 (en)
FI (1) FI773638A (en)
FR (1) FR2373364A1 (en)
GB (1) GB1556754A (en)
IT (1) IT1091653B (en)
NL (1) NL7712765A (en)
SE (1) SE7714024L (en)
ZA (1) ZA776921B (en)

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI60151C (en) * 1979-06-26 1981-12-10 Tampella Oy Ab HYDRAULISK SLAGANORDNING
US4474248A (en) * 1981-04-23 1984-10-02 Giovanni Donadio Hydraulic demolishing rock drill
SE8205029L (en) * 1981-11-05 1983-05-06 Ingersoll Rand Co HYDRAULIC DRIVE FORM AND RETURN MACHINE
FI66460C (en) * 1982-10-08 1984-10-10 Tampella Oy Ab TRYCKMEDIEDRIVEN SLAGAPPARAT
JPS59105383U (en) * 1982-12-29 1984-07-16 油谷重工株式会社 hydraulic breaker valve
DE3505732A1 (en) * 1985-02-15 1986-08-28 Mannesmann AG, 4000 Düsseldorf Hydraulically operated percussion device
AU602304B2 (en) * 1985-02-25 1990-10-11 Quarry Engineering Developments Pty. Ltd. Concrete and rock breaking apparatus
AU693543B2 (en) * 1989-05-01 1998-07-02 Indeco S.P.A. Method to make independent from piston wear the fluid tight seal of the inlet and outlet ports of fluid in a hydraulic appliance
JPH01161944U (en) * 1988-04-28 1989-11-10
US5064005A (en) * 1990-04-30 1991-11-12 Caterpillar Inc. Impact hammer and control arrangement therefor
CA2048374A1 (en) * 1990-08-06 1992-02-07 Bernard L. Gien Hydraulic hammer
SE503683C2 (en) * 1994-11-17 1996-07-29 Berema Atlas Copco Ab Hydraulic breaker
US6782956B1 (en) 2003-03-07 2004-08-31 Ingersoll-Rand Company Drive system having an inertial valve
US6863134B2 (en) * 2003-03-07 2005-03-08 Ingersoll-Rand Company Rotary tool
FI121139B (en) * 2004-02-02 2010-07-30 Sandvik Mining & Constr Oy Hydraulic hammer and tool sleeve
FI123802B (en) * 2004-09-03 2013-10-31 Sandvik Mining & Constr Oy Penetrator and method for lubricating a penis tool
DE602005022278D1 (en) * 2005-04-27 2010-08-26 Caterpillar Inc Lubrication device for hydraulic or pneumatic tool
EP2605888A1 (en) 2010-08-19 2013-06-26 Caterpillar INC. Lubrication system for a breaking tool
US9010493B2 (en) 2012-03-13 2015-04-21 Caterpillar Inc. Lubrication arrangement
US9217341B2 (en) 2013-08-15 2015-12-22 Caterpillar Inc. Lubrication system for tool

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1431835A (en) * 1965-01-28 1966-03-18 Montabert Ets Percussion device
US3490549A (en) * 1968-08-13 1970-01-20 Westinghouse Air Brake Co Hydraulic percussive drill
DE2024501C3 (en) * 1970-05-20 1975-07-03 Fried. Krupp Gmbh, 4300 Essen Impact device with hydraulically reciprocating working piston
US3887019A (en) * 1971-05-11 1975-06-03 Af Hydraulics Hydraulic percussive implement
US3955478A (en) * 1973-10-29 1976-05-11 Dresser Industries, Inc. Hydraulically powered percussion drill
GB1440956A (en) * 1973-12-01 1976-06-30 Af Hydraulics Hydraulically-operated devices
RO74260A (en) * 1974-04-25 1980-10-30 Oy Tampella Ab,Fi POWERFUL PERFORATER WITH PRESSURE LIQUID
FI50941C (en) * 1974-04-25 1976-09-10 Tampella Oy Ab Impactor for pressurized fluid.
GB1450972A (en) * 1974-06-11 1976-09-29 Klemm G Percussive tool
FI56430C (en) * 1975-10-20 1982-08-09 Tampella Oy Ab SLAGANORDNING DRIVEN AV EN TRYCKVAETSKA

Also Published As

Publication number Publication date
FI773638A (en) 1978-06-11
GB1556754A (en) 1979-11-28
CA1059405A (en) 1979-07-31
DE2754489A1 (en) 1978-06-15
US4149602A (en) 1979-04-17
ES464623A1 (en) 1978-09-01
FR2373364B1 (en) 1982-10-29
AT361416B (en) 1981-03-10
IT1091653B (en) 1985-07-06
AU3072277A (en) 1979-05-24
FR2373364A1 (en) 1978-07-07
DK527177A (en) 1978-06-11
ATA854577A (en) 1980-07-15
ZA776921B (en) 1978-09-27
BE861259A (en) 1978-03-16
JPS5752199B2 (en) 1982-11-06
NL7712765A (en) 1978-06-13
JPS5372702A (en) 1978-06-28
CH617117A5 (en) 1980-05-14
AU505754B2 (en) 1979-11-29

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